[439] | 1 | /**
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| 2 | ** @file mruby/gc.h - garbage collector for mruby
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[270] | 3 | **
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| 4 | ** See Copyright Notice in mruby.h
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| 5 | */
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| 6 |
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| 7 | #ifndef MRUBY_GC_H
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| 8 | #define MRUBY_GC_H
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| 9 |
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[331] | 10 | #include "common.h"
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[270] | 11 |
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| 12 | /**
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| 13 | * Uncommon memory management stuffs.
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| 14 | */
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| 15 | MRB_BEGIN_DECL
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| 16 |
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| 17 |
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| 18 | struct mrb_state;
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| 19 |
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[331] | 20 | #define MRB_EACH_OBJ_OK 0
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| 21 | #define MRB_EACH_OBJ_BREAK 1
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| 22 | typedef int (mrb_each_object_callback)(struct mrb_state *mrb, struct RBasic *obj, void *data);
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[270] | 23 | void mrb_objspace_each_objects(struct mrb_state *mrb, mrb_each_object_callback *callback, void *data);
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| 24 | MRB_API void mrb_free_context(struct mrb_state *mrb, struct mrb_context *c);
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| 25 |
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| 26 | #ifndef MRB_GC_ARENA_SIZE
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| 27 | #define MRB_GC_ARENA_SIZE 100
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| 28 | #endif
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| 29 |
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| 30 | typedef enum {
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| 31 | MRB_GC_STATE_ROOT = 0,
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| 32 | MRB_GC_STATE_MARK,
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| 33 | MRB_GC_STATE_SWEEP
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| 34 | } mrb_gc_state;
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| 35 |
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[439] | 36 | /* Disable MSVC warning "C4200: nonstandard extension used: zero-sized array
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| 37 | * in struct/union" when in C++ mode */
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| 38 | #ifdef _MSC_VER
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| 39 | #pragma warning(push)
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| 40 | #pragma warning(disable : 4200)
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| 41 | #endif
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| 42 |
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[270] | 43 | typedef struct mrb_heap_page {
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| 44 | struct RBasic *freelist;
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| 45 | struct mrb_heap_page *prev;
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| 46 | struct mrb_heap_page *next;
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| 47 | struct mrb_heap_page *free_next;
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| 48 | struct mrb_heap_page *free_prev;
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| 49 | mrb_bool old:1;
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| 50 | void *objects[];
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| 51 | } mrb_heap_page;
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| 52 |
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[439] | 53 | #ifdef _MSC_VER
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| 54 | #pragma warning(pop)
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| 55 | #endif
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| 56 |
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[270] | 57 | typedef struct mrb_gc {
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| 58 | mrb_heap_page *heaps; /* heaps for GC */
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| 59 | mrb_heap_page *sweeps;
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| 60 | mrb_heap_page *free_heaps;
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| 61 | size_t live; /* count of live objects */
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| 62 | #ifdef MRB_GC_FIXED_ARENA
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| 63 | struct RBasic *arena[MRB_GC_ARENA_SIZE]; /* GC protection array */
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| 64 | #else
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| 65 | struct RBasic **arena; /* GC protection array */
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| 66 | int arena_capa;
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| 67 | #endif
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| 68 | int arena_idx;
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| 69 |
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| 70 | mrb_gc_state state; /* state of gc */
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| 71 | int current_white_part; /* make white object by white_part */
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| 72 | struct RBasic *gray_list; /* list of gray objects to be traversed incrementally */
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| 73 | struct RBasic *atomic_gray_list; /* list of objects to be traversed atomically */
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| 74 | size_t live_after_mark;
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| 75 | size_t threshold;
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| 76 | int interval_ratio;
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| 77 | int step_ratio;
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[331] | 78 | mrb_bool iterating :1;
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[270] | 79 | mrb_bool disabled :1;
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| 80 | mrb_bool full :1;
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| 81 | mrb_bool generational :1;
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| 82 | mrb_bool out_of_memory :1;
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| 83 | size_t majorgc_old_threshold;
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| 84 | } mrb_gc;
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| 85 |
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| 86 | MRB_API mrb_bool
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| 87 | mrb_object_dead_p(struct mrb_state *mrb, struct RBasic *object);
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| 88 |
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| 89 | MRB_END_DECL
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| 90 |
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| 91 | #endif /* MRUBY_GC_H */
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